S&G TOOL AID CORP. has for over 40 years supplied the automotive, heavy duty, electronics, agriculture, marine and related industries with a wide range of general tools, equipment and mechanics? aids. Our products are innovative and manufactured to professional quality standards. Key Features: Use this fingertip spinner to pre-tightened nuts and bolts. Push into socket, spin to tighten, put on ratchet and finish job. Cut labor time in ratcheting work. Available in 1/4", 3/8" and 1/2" square drive sizes and as a three piece set.